Title:
時分割多重化パイロットを使用する同報OFDMシステムにおける同期化
Document Type and Number:
Japanese Patent JP2011502454
Kind Code:
A
Abstract:
In an OFDM system, a transmitter broadcasts a first TDM pilot on a first set of subbands followed by a second TDM pilot on a second set of subbands in each frame. The subbands in each set are selected from among N total subbands such that (1) an OFDM symbol for the first TDM pilot contains at least Si identical pilot- 1 sequences of length Li and (2) an OFDM symbol for the second TDM pilot contains at least S2 identical pilot-2 sequences of length L2, where L2 > L1, S1 L1 = N, and S2 L2 = N. The transmitter may also broadcast an FDM pilot. A receiver processes the first TDM pilot to obtain frame timing (e.g., by performing correlation between different pilot- 1 sequences) and further processes the second TDM pilot to obtain symbol timing (e.g., by detecting for the start of a channel impulse response estimate derived from the second TDM pilot).
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Inventors:
Ring, Fuyun
Gupta, Arok Kumar
Krishnam Ashi, La Grumman
Chari, Murari Ramaswamy
Villayan, Rajib
Barcelgi, Bojan
Gupta, Arok Kumar
Krishnam Ashi, La Grumman
Chari, Murari Ramaswamy
Villayan, Rajib
Barcelgi, Bojan
Application Number:
JP2010532309A
Publication Date:
January 20, 2011
Filing Date:
October 31, 2008
Export Citation:
Assignee:
QUALCOMM INCORPORATED
International Classes:
H04J11/00; H04W56/00
Domestic Patent References:
| JP2002261728A | 2002-09-13 | |||
| JP2005506757A | 2005-03-03 | |||
| JP2007514331A | 2007-05-31 | |||
| JP2006174472A | 2006-06-29 |
Foreign References:
| WO1998000946A2 | 1998-01-08 |
Attorney, Agent or Firm:
Kurata Masatoshi
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen
Satoshi Kono
Makoto Nakamura
Yoshihiro Fukuhara
Takashi Mine
Toshio Shirane
Sadao Muramatsu
Nobuhisa Nogawa
Kocho Chojiro
Naoki Kono
Katsu Sunagawa
Katsumura Hiro
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Takenori Masanori
Takuzo Ichihara
Yamashita Gen